<template>
    <div>
        <div class="search">
            <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或者拼音">
         </div>
         <div 
                class="search-content" 
                ref="search"
                v-show="keyword">
             <ul>
                 <li 
                 class="search-item border-bottom" 
                 v-for="item of list" 
                 :key="item.id"
                 @click="handleCityClick(item.name)"
                 >
                    {{item.name}}
                 </li>
                 <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
             </ul>
         </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll'
export default {
    name: 'CitySearch',
    props: {
        cities: Object
    },
    data () {
        return {
            keyword: '',
            list: [],
            timer: null
        }
    },
    computed: {
        hasNoData () {
            return !this.list.length
        }
    },
    watch: {
        keyword () {
            if (this.timer) {
                clearTimeout(this.timer)
            }
            if (!this.keyword) {
                this.list = []
                return 
            }
            this.timer = setTimeout(() => {
                const result = []
                for (let i in this.cities) {
                    this.cities[i].forEach((value) => {
                        if(value.spell.indexOf(this.keyword) > -1 ||
                            value.name.indexOf(this.keyword) > -1) {
                                result.push(value)
                            }
                    })
                }
                this.list = result
            }, 100)
        }
    },
    methods: {
         handleCityClick (city) {
          //派发dispatch到store里面
        //   this.$store.dispatch('changeCity', city)
         this.$store.commit('changeCity', city)
         this.$router.push('/')
      }  
    },
    mounted () {
         this.scroll = new Bscroll(this.$refs.search)
    }
}
</script>
<style lang="stylus" scoped>
    @import '~style/varibies.styl'
    .search
        height .72rem
        padding 0 .1rem
        background $bgColor
     .search-input
         box-sizing border-box
         width 100%
         height .62rem
         padding 0 .2rem
         line-height .62rem
         border-radius .06rem
         text-align center
         color #666
    .search-content
         z-index 1
         overflow hidden
         position absolute
         top 1.58rem
         left 0
         right 0
         bottom 0
         background #eee
     .search-item
        line-height .62rem
        padding-left .2rem
        background #fff
        color #666
</style>